Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Kaplan–Meier survival analyses on PFS curves to differentiate recurrence in patients with stage IV CRC by individual and combined biomarkers. (A–D) PFS curves to differentiate recurrence in patients with stage IV CRC stratified by numbers of CTC (A), presence of CTM (B), serum CEA (C), and CA19-9 levels (D). (E–I) PFS curves to differentiate recurrence in patients with stage IV CRC stratified by combined biomarkers.
